The pros and cons of the early adopter.
Factors like weight and comfort often arise. Perhaps a future strategy in this space will be to minimise the headset componentry by shifting as much as possible externally, similar to how Apple has approached the battery issue with the Vision Pro.
(imagination running with that idea : future iphones and Macs will be the processing units for more-compact future Vision Pros)
Maybe AVP aspirationally (once in sunglass form factor) seeks to replace iPad, then Mac, then iPhone?
He interviewed the guy who wrote the Solar Eclipse Timer app (https://www.solareclipsetimer.com) and also publishes a ton of info about eclipses in general (especially how to spot all the different interesting parts, and how to capture it on camera). That info is in a book here: https://solar-eclipse-timer.myshopify.com
No affiliation with either of them, just they have some of the most succinct and helpful info, especially for sharing with other people too (I hope to have my kids manage a few experiments during totality, assuming we don't get any clouds!).